Smart (Bi-Level) Stairwell Lighting
Energy Savings
End Uses
Stairwells, Service Corridors, Storage Rooms
Smart (Bi-Level) Stairwell Lighting
Demonstration Location(s)
  • Butte Community College, Oroville, Facilities Building
  • Cal State University, Northridge, Sierra Tower
  • Citrus Community College, Glendora, Learning Unit
  • Cyprus Community College, Cypress, Learning Center
  • San Diego State University, San Diego, Professional Studies & Fine Arts Building
  • Sonoma State University, Rohnert Park, Darwin Hall
  • UC Davis, Davis
  • UC Irvine, Irvine, Engineering Tower
  • UC Riverside, Riverside, Aberdeen-Inverness Dormitory
  • UC Santa Barbara, Santa Barbara, Cheadle Hall
  • University of CA Office of President, Oakland, UCOP Building
The smart bi-level stairwell luminaire meets lighting and safety code requirements for occupied interior stairwells, while saving energy by sensing occupancy at every fixture and reducing the lighting level during the many hours when no one is present. The fixture is practical for both new and retrofit applications, and it also can be used in other low-occupancy locations such as break rooms and hallways. Case studies show 40-80% savings compared with traditional products. Its simple payback period can be less than one year in new construction and one to two years in retrofits. The key components in the product are ultrasonic occupancy sensor technology, bi-level dimming controls, programmed-start electronic ballast, and a lamp conditioning circuit. The lower lighting level for unoccupied periods can either be preset or adjusted by users/contractors.